Hello and Welcome!
As your name says, quilting is an adventure for sure! Try a topstitch 90/14 needle. Be sure the bobbin is wound correctly.
You want to raise the quilt on the left side so it is flat with the machine bed. When it drops down the side, it can cause drag on the quilt.
What pattern are you quilting? Some machines have issues if you stitch left to right Or right to left. It doesn't like the shift in the movement. By your post that may be the issue.
What thread and type? A large spool needs to be on a stand. It does matter how the thread is wound on the spool and how it positioned on the machine.
Hope that may help solve the issues. Again Welcome!